' or 



284 University of California Publications. [botany 



Probably a state or form produced by the admixture of cold 

 milky waters from the glaciers, and possessing characters inter- 

 mediate between ff. macrocephalus and rudis, but those of the 

 latter much exaggerated. The receptacles seem to continue 

 growing at the tips after they have become more or less disasso- 

 ciated from the rest of the plant at their bases. In the Juneau 

 specimens the receptacles are decidedly swollen. 



Fucus evanescens f. contractus Kjellman. 



On rocks in the litoral zone. St. Lawrence Island, Alaska, 

 Kjellman (1889, p. 34); Golofnin Bay, Alaska, R. G. McGregor, 

 Nos. 5673!, 5679!; St. Michael, Alaska, W.A.8., Nos. 5238!, 

 5239!, 5252! 



A narrow plant referred, as to other than Kjellman's plants, 

 with some doubt. 



Fucus evanescens f. dendroides Stroemfelt. 



Agattu Island, Alaska, Townsend, Nos. 5755!, 5756! 



The specimens referred here seem to agree well with Stroem- 

 felt's description and figure (1886, p. 35, pi. 3). It is certainly 

 a form of decidedly arborescent appearance, presumably erect in 

 habit. 



Fucus evanescens f. pergrandis Kjellman. 



On stones near high water mark. Kyska Island, Alaska, 

 Townsend, No. 5773! ; east shore of Amaknak Island, Bay of 

 Unalaska, Alaska, W.A.8. and A.A.L., Nos. 3284!, 4049!, in 

 Collins, Holdeu and Setchell, P. B.-A., No. XL VI!, under F. 

 platy carpus; Yakutat Bay, Alaska, Rev. Albin Johnson, No. 

 5701! ; Port Renfrew, B. C, Butler and Pollen, No. 20! 



A large, broad form with large, broad receptacles which are 

 sometimes very fiat or sometimes very considerably swollen. 



Fucus evanescens f. angustus Kjellman. 



On rocks in the lower litoral zone. Whidbey Island, Wash., 

 N.L.G., No. 76! ; East Sound, Orcas Island, X.L.G., No. 624!, 

 in Collins, Holdeu and Setchell, P. B.-A., No. 926! 



A narrow form to be compared with/, contractus, from which 

 it seems to differ in aspect on account of its more regularly 

 branched, linear frond. 



